Plate steel head cover



JUL 3 1935 R. E. B. SHARP 1,987,082v

- PLATE STEEL HEAD covER Filed March 18, 1932 '2 Sheets-Sheet 1 Jan. s, 1935. R, E, B, SHARP 1,987,082

PLATE STEEL HEAD COVER Filed March 18, 1932 2 Sheets-Sheet 2 e5 61 4| M G, 63

' i l 62% @2 f/ VB y .58 iil 35 //f 0% l y o |l y 1| 65 M 2 1 i Z8 *I 60* {l} ll' f il l Il i I INVENTOR 55%,' j f. @.ja//v Patented Jan. 8, 1935 assigner tof Baldwin-Southwark Q01-poration, .a corporation. of- 1;)elamrare.` y

Application March18, 193,2",I4 eri'al loiclaimsi' largest-$1111)- This invention relates generally` to hydraulic machines and more particularly to an improved hydraulic turbine plate steel head cover having the component plate steel elementsthereoi so' 5 constructed and arranged that'theyl may be easily rolled or otherwise formed in. a. manner which isleconomical and will provide the necessaryT rigid'- ity and stability of construction such as is. necessaryinhydraulioapparatus.

-One object of the invention-iis. tojprovide an improved plate steel headcover and particularly one with two principalelements. offdish. forma; tion, so that, for example-,they 'may 'be'.rea'dily spun, rolled or easily pressed by a simplepress and die. A iurther object is to. form thepar'ts, s o asf to present .a construction which. permitsjthe members to be effectively welded without subjectf ing the weld to abnormal strains. If ilnd'e'rcer'- tain conditions. it. is desired, to have themembers detachably connected together, the .component .elements may be suitably boltedv or.. rivetedltogether butin any event it will' -heseenfromthe disclosure/herein that. al relativelyfsirnple and economical constructionha's. been devised.`

Other obiects andadvantages be moreapjf parent to those, skilled in the.l artI from the fol'- lowing description of the accompanying drawings inlllhich: j Fig.. 1 is a vertical section through an open flume propeller-#type setting.. i

Fig. 2 is a. perspective of, a. portion of the vhead. cover toshowl thearrangemntof. ribs. Eig. 3. a. vertical section, showing', themann'er in. whichmy improvedheadcorer is employed finaFrancis turbinav ,l "i j rWhile. theinvention isparticularlyadapted for an open flumeturbine. settng i'twill' `of course be understood that the structurefarid' principles of Yconstruction are. equally applicable to Francis ytype turbineaasshown in Fig.T 3, or to various vtypes, of propeller turbines ornurnps4 as -shown in Fig. 1. The, particular specific embodiment of the invention `as shown in-jlig;l l comprises' an inlet. passage 1. in which a series of, usual adjustable guide varies. 2. are disposed.. These guide Yanes vare adiustably supported by stay-bolts whichV support. the. head cover, generally findicated at 4,. in spaced relation to the lower distributorgenerally indicated at .5." The stay bolts have enlarged portions 6 at each end thereof to provide shoulders engaging. the head cover and the lower .distributor ring .5v inwhich .holes are provided for receiving the reducied ld'sf 8.. ofthe stay bolts. Thev distributor plate 5..)can be either 'cast or formed'of, heavy/plate metal, circularly [10,.and plate 7.

of. platejsteeljis sultablywwelled to distributor plate aat. thettw.: points 11- Whilel radially er; tending.l vertical plate; metal:v ribs' 'V12y are suitably ircumferentiallyv spaced' tofsu'pport .ring 51.j1v A l'iorizontaltcircular ilange' lmay alsogjbe. added if .desired andk all of the'segeIements. are preferably Suitably ,Wlddr ,9gqilie`n.. for instance as at 14,

tube ma "harey afrelativelythincirsinooth curved" surface to' the metall i5 'weldellas @loro indicate'ci2' at., g() j thegate. operating 'servomotor'nla be connected to abearing 2l vl'lvhif'zh ,consistsI of a vshort bearing gextelading.,tllrol'l''gli an "onenirigV iny and Welded to apl'ate nieta Xtler'l'sion flange 19t` 1 'Them lowjerf ruction `as l eadcorer 4,cmnprises1 a circular piece-"ofpla'te flnetal a. relatively flat portion v2 5, an inner downwardly curved. portion `26 and an router up- .Wardlylcurred portion 27. `It is seen thatthe turning .of ,the inner and louter portions toward axial I directions iseoilduciye tofa relatively simplel form- .ing operation, .either by. rollingl such as spinning a'nge-l-ikeportions 26. a'rld27. being at the inner and outer ends of the 'intermedi-ateJportion. 25,

Aa lvery desirable rigid-construction `is created.

The, partielles forms not only one wall forlnlet .22. projecting'..oupwerqlrfrm ,alleweder 'retirel .chr bolts alare.cpnriec-tedtqsultable angle meml' flo v.or by ldiesA of simple formationand due to the specific speed propeller type runner 32 whose blades are relatively few in number, for example, preferably six or less and are relatively flat in the direction of fluid flow thereover and are inclined at a relatively small angle with respect to a. plane normal to the runner axis.

To form the top portion of the head cover there is provided van uppenplate 3 3 formed" in somewhat the generalv manner ofthe lower-plate 25, it being noted. that plate 33 is of dome shaped formation preferably with its periphery turned. downwardly to provide a angelike-portion-- 34- adapted to rest upon and be welded lto preferably the upper edge of flange 27;'.` l A The dome shape of plate33*addsconsiderable4 strength to the generalhead cover construction, "1 and this strength additionally effectsa rigidumtary structure throughout the low-head cover especially when supplemented .by the provision of `a series of radial webs 35 terminating at their inner ends at 36 and at Atheir outer ends at 37 adjacent a series of pipes `38 whichextend through openings 39 formed'in plate 33, These pipes are disposed in axial alignment with eachof the stay bolts 3 and are welded to plates 25 a11d `33.` Y In'- stead of using material such as `a piece Volfpipe the passageway 40 leading to stay bolts 3`may be formed of 'any other suitable material although pipe sections provide a veryfeconomical andfyet 30 yis suitably supported by av ring '-:`4'9 welded tol annular plate 44. rfllherunner shaft Q50 extends upwardly through both thebearing andajspace 51 which is provided with a suitable removablev plate metal c over 52 of flat annular formation. 'The outerV ends of lateral stud bolts or rods53 are vsuitably fastened to thel usual surrounding structure of 'concrete or other material while their innenends' may be secured to plate metal or cast vangle anchcrages 54 suitably welded to the upper Vdishedplate 33. If the turbine is of the type hav'- ing ran .inlet casing, vsuchiijor exampleasa volute, partially shown at- 60, Fig. 3,V so a s'to ma .le` it desirame te provide a shifting ring 61 en top'ef'the headcover, it is readily seen that the shiftingiring guides 62 may be directly welded to the top of disnea parte 33 and the guide vene operating Vreds,

should extend upwardly' through passages 40 for connection to the shifting ring throughflinks 63.

Fig. 3 also illustrates the application of my improved head cover to a. Francis turbine as hereinbefore mentioned wherein a Francis runner 64 has its hub 6 5 forming a curved continuation. of a head cover: plate which extends radially from the shaft y50` and vbearingf4'7'.` The remaining head cover `structure has allof the structural and functional characteristics of the Fig. 1 arrangement.

vFrom the foregoing disclosure itis seen that my l improved construction employs componentplate metal elements so formed thatthey may be yreadily rolled or otherwise easily shaped and assembled Vin such a manner that. ifdesired. thep'arts may be effectively welded together, while the pipe sec-` tions forming passages to guide vane stay bolts provide a very simple and yet effective construction. If desired the lower edge of plate 25 may be suitably machined as at 56 adjacent the ends of guide vanes 2 to reduce leakage to a minimum around the guide vanes. It will also be noted that for the mostpartthe ribs and" component plate metal parts have substantially straight line contact at their line of juncture thusy greatly facilitating the assembly and manufacture of the various plate metal elements, v ""It'will Lf course be understood by those skilled 'in' Ytherart that various changes and rearrange- "ments Voi? partsfmayz'be made without departing fr'om the spiritofftheinvention as set forth in the appended claims. IAclaim: A

1. A plate metal head cover for a hydraulic machine comprisinga circular plate metal member j having 'inner 'fand youter portions extending toward opposite` axial 'dire`cti'ons ,'Y and a 'conical `p1ate mean member fonnedseperateiy 'from but secured tothe inner axial portionof said circular plate toform 'a continuation thereof, bothof4 said members being formed along substantially straight linelements extending over the mail or portion of the:length'ofjsaidfmembers. 1 f `2. A plate, metal head cover for ajhydraulic machinecomprisinlg'a plate having aninner cir-I cular portion turnedtoward' anA axial direction',

and a; conical' pltemetl member' "formed SGP- farately from'jbut rigidly "secured to Asaid; axial prtihl i0; forme Compilation J.tllleroi beth-'FOI saidplates. having thhiaior'portin, 9i thm length fo d jwith substantiallystraight line generatricc'es."""`v 3., Aplate' metal head cover vfor-fa 'hydraulic turbine or pumpjcomprising ai single plate metal 'member forming both a n upper distributor'plate andv a' Wall ofa'transition space disposedv inwardly of thedlstributor portion. s 'aidgplatejbeing circular andhaving itsfouterportion turned toward anaxial direction to'provide'a-peripheral flange, hand a dome"shapedplatemetal memberrigidly 'secured tosaid peripheralange..

A'plate'metal headcove'r for *afhydr'aulic turbineor pump comprisingasingle plate v I :ri'etal member kforming both upperdistributorplate and a wall of a.transition'spacedisposedinward- 1y of the 'distributor portiofmidplate .bng'crcularhaving' its outerf portion turned toward ausfiel direction 'top rvidea'iperipherlnhse. #and a dome shaped' plat'ernetal memberfhaving `its outer yportion turned toward'anaxial direction "to provideaange which isrigidlysecured tosaid peripheral'rlange to provide a'unitarylhead'cover machine comprising opposed Acircular'platesv one of which is'permanentlyfsupported by and rigidly lseemed te `the -other` adjacent* theiry penprieri'es, the lower one of said circulanj'plates rforrriing fa passage wall for conductin'glwater throughth-'hydraulic machine andtheupper one of said circuv*lar plates being' of dome shape,"and a'seriesfof circumferentially disposed radially extending verticalribs positionedbetween said circular'-plate metal `members :and rigidly secured thereto.

j 6.` A'plate metal head cover yfor a hydraulic 'machine comprising opposedcirculark plates one ,ofA which is supported; 'by and: rigidly s ecuredj to "the other' adjax'zeiitJ their `pei-ipheries,- the lower` o neof said circularplatesjforminga passagewall f`)r""cc nduetin'g water throughthe hydraulicmachine and the upper one of said circular plates being of dome shape, a circular plate metal member rigidly secured to and projecting axially from one of said opposed circular plates, and vertical ribs projecting inwardly therefrom and rigidly secured thereto to provide a support for a shaft bearing. f

7. A plate metal head cover for a hydraulic machine comprising opposed circular plate metal members one of which has a peripheral flange extending toward an axial direction and rigidly supported by the other of 'said members, and pipe like members secured to said opposed members to provide passageways therethrough, the lower one of said circular plates forming a passage wall for conducting water through the hydraulic machine and the upper one of said circular plates being of dome shape.

8. A combined plate metal head cover and upper distributor ring for a hydraulic machine comprising a dome shaped plate metal member and an opposed circular plate metal member rigidly supported with said dome shaped member in spaced relation thereto, a lower distributor ring, guide vane shafts supported by and between welded to the inner edge of said distributor ring, i

and ribs disposed between said distributor and annular rings for holding the same in rigid rela-f tion, a plate metal operating ring having a flat annular portion and a anged peripheral portion, v

and said distributor ring having provision for journalling thereon said annular portion ofy the operating ring.

10. A plate metal setting for a hydraulic machine comprising a lower distributor plate having an annular recess for journalling a plate metal shifting ring, said plate metal shifting ring having a at annular portion journalled in said annular recess and a peripheral flange relatively gradually turned to provide a smooth inlet surface.

ROBERT E. BRUNSWICK SHARP. 

